Weeeelllll... I was going to just go "fair point" and stop at that but I don't think I entirely agree. Most of those 80k, perhaps all but a few hundred, would do whatever they were told to do. They are the sort of banal evil that just wants a (large) paycheck and a decent annual review. You could pick them up and plop them into another, completely benign tech company doing something totally different and they'd make sure the site ran properly and the backlog was groomed just so.
They're like, er, Godzilla's limbs. For sure, very damaging, but not really directly responsible. His nasty reptile brain is in charge. That's the few hundred at the top that decide that Meta is going to fight these lawsuits or claim they're actually giving kids powerful tools for controlling their online experience or whatever other PR bullshit they barf up every time this happens. That's not some random SRE.
Eh, they are shitbags though; they knew what they were getting into. I'm not advocating for welfare for 'em. So, after that: fair point well made.
The secondary effects of nuking Meta would be pretty severe. The markets really would take a big hit and some (near-) retirees would suffer quite a lot.
Oh God, who's to say it wouldn't go all hydra on us: Meta goes pop, 80,000 well-off sociopaths scatter to hacker spaces around the world and produce a few thousand even worse companies.